package network;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.net.Socket;
import java.util.Scanner;

public class TcpEchoClient {
    private Socket socket = null;

    public TcpEchoClient(String serverIP,int serverPort) throws IOException {
        socket = new Socket(serverIP,serverPort);
    }

    public void start(){
        System.out.println("客户端启动！！！");

        try(InputStream inputStream = socket.getInputStream();
            OutputStream outputStream = socket.getOutputStream()){

            Scanner scanner = new Scanner(inputStream);
            Scanner scannerIn = new Scanner(System.in);
            PrintWriter printWriter = new PrintWriter(outputStream);
            printWriter.flush();

            //Ctrl + Alt + T
            while(true){
                // 1 . 从控制台读取数据
                System.out.println(" -> ");
                String request = scannerIn.next();

                // 2 . 把请求发送给服务器
                printWriter.println(request);
                //刷新缓冲区
                printWriter.flush();

                // 3 . 从服务器读取响应
                if(!scanner.hasNext()){
                    break;
                }
                String response = scanner.next();

                // 4 . 打印响应结果
                System.out.println(response);

            }
        }catch(Exception e){
            throw new RuntimeException(e);
        }
    }

    public static void main(String[] args) throws IOException {
        TcpEchoClient client = new TcpEchoClient("127.0.0.1",9090);
        client.start();
    }

}
